September 2026
Weather in Letchworth Garden City, day by day
Mean temperature
18.0°C
Station average 15.4°C
Highest
27.3°C
On Sun 6 Sep
Lowest
9.6°C
On Mon 21 Sep
Rain
26.2 mm
54% of the station average, 48.2 mm
Wet days
7
With 0.2 mm of rain or more
Wettest day
13.4 mm
On Sun 13 Sep
Strongest gust
19 mph
On Wed 2 Sep
Highest pressure
1031.3 hPa
Lowest 1004.2 hPa
How it compares
The 2nd warmest September of the 17 on record, and the warmest since 2023.
The 3rd driest September of the 17 on record, and the driest since 2014.
Day by day
| Day | High | Low | Rain | Gust |
|---|---|---|---|---|
| Tue 1 | 23.3°C | 11.9°C | 0.0 mm | 13 mph |
| Wed 2 | 20.5°C | 15.3°C | 0.6 mm | 19 mph |
| Thu 3 | 25.4°C | 18.5°C | 0.0 mm | 14 mph |
| Fri 4 | 20.4°C | 15.2°C | 1.0 mm | 18 mph |
| Sat 5 | 22.7°C | 12.9°C | 0.0 mm | 7 mph |
| Sun 6 | 27.3°C | 14.2°C | 0.0 mm | 13 mph |
| Mon 7 | 24.8°C | 17.2°C | 0.0 mm | 15 mph |
| Tue 8 | 17.8°C | 13.4°C | 10.0 mm | 9 mph |
| Wed 9 | 18.5°C | 11.6°C | 0.0 mm | 7 mph |
| Thu 10 | 20.8°C | 12.8°C | 0.0 mm | 15 mph |
| Fri 11 | 22.3°C | 15.1°C | 0.4 mm | 12 mph |
| Sat 12 | 23.5°C | 12.7°C | 0.0 mm | 17 mph |
| Sun 13 | 21.1°C | 18.2°C | 13.4 mm | 10 mph |
| Mon 14 | 24.2°C | 17.1°C | 0.0 mm | 13 mph |
| Tue 15 | 22.9°C | 15.5°C | 0.0 mm | 13 mph |
| Wed 16 | 19.4°C | 12.7°C | 0.0 mm | 9 mph |
| Thu 17 | 20.2°C | 13.6°C | 0.6 mm | 14 mph |
| Fri 18 | 19.6°C | 11.6°C | 0.0 mm | 19 mph |
| Sat 19 | 22.0°C | 16.4°C | 0.0 mm | 19 mph |
| Sun 20 | 20.3°C | 12.2°C | 0.0 mm | 10 mph |
| Mon 21 | 22.8°C | 9.6°C | 0.0 mm | 7 mph |
| Tue 22 | 24.1°C | 13.6°C | 0.0 mm | 5 mph |
| Wed 23 | 22.3°C | 13.8°C | 0.0 mm | 12 mph |
| Thu 24 | 21.7°C | 10.0°C | 0.0 mm | 8 mph |
| Fri 25 | 23.2°C | 12.0°C | 0.0 mm | 5 mph |
| Sat 26 | 21.8°C | 11.2°C | 0.0 mm | 6 mph |
| Sun 27 | 22.1°C | 13.3°C | 0.0 mm | 17 mph |
| Mon 28 | 19.2°C | 11.8°C | 0.0 mm | 10 mph |
| Tue 29 | 24.6°C | 14.6°C | 0.2 mm | 12 mph |
| Wed 30 | 24.4°C | 17.4°C | 0.0 mm | 17 mph |
Weather fronts
- Likely cold front · Fri 4 Sep, 07:30
Found automatically from this station’s readings alone, so likely rather than certain. What’s a front?
September in other years
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Rainfall up to yesterday is from the Environment Agency’s rain gauges near Letchworth: the station’s own gauge is sheltered by nearby buildings and trees and catches less than falls. Today’s is the station’s. Contains Environment Agency information © Environment Agency and/or database right, under the Open Government Licence.